{
  "manageEntity": {
    "action": "Create",
    "entityId": "529907375",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":20,\"entity_id\":723233723,\"body\":\"ayyyy!!\",\"comment_id\":529907375,\"track_timestamp_s\":19,\"mentions\":[]}}",
    "nonce": "0xa033c102f55a517d001419a70f67e93fd6ee15e0c6fdbc21acd6e26c28b9f545",
    "signature": "0xdad6a59807dd6d88be76a45faafcb3da951136e7d80a28f39bb2d747c0b135e65d7f6f4e75e5655f0914b27e25665be2af77eac2499caa5e22794805d4e80d251c",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}